Jennifer Loiacono
President
Automaton Engineering, Inc.
P.O. Box 10282
Brooksville, FL 34603When receiving serial data on the PIC18C442, the value
is not reflected correctly in the RCREG reception register.  However, the
signal on the receiving PIC is perfect in terms of timing and accuracy.
Despite accurate signal levels, debugging RCREG immediately after data is
received reveals that the byte seems to flip back and forth.

e.g., a byte equal to 4 (dec) will oscillate between 4 and 32.  A byte equal
to 1 will oscillate between 1 and 128, etc.

Again, this value is being read immediately after reception (triggered by RX
interrupt), so it is highly unlikely that program code could be altering the
register after reception.

Has anyone seen a problem like this before, or perhaps have any ideas as to
its cause?  I have been stumped on this for a while, so ANY help would be
greatly appreciated!


Jennifer Loiacono
Automaton Engineering, Inc.
P.O. Box 10282
Brooksville, FL 34603

jen@automatonengineering.com
http://www.automatonengineering.com

voice:   (352) 796-7088
mobile: (352) 650-6433
fax:      (352) 796-0544




jen@automatonengineering.com
http://www.automatonengineering.com

voice:   (352) 796-7088
mobile: (352) 650-6433
fax:      (352) 796-0544

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